ASTM C191-21
(Test Method)Standard Test Methods for Time of Setting of Hydraulic Cement by Vicat Needle
Standard Test Methods for Time of Setting of Hydraulic Cement by Vicat Needle
SIGNIFICANCE AND USE
5.1 This test method provides a means of determining compliance with a specification limit for Vicat time of setting. Refer to the appropriate specification for the cement to determine if this test method is used for specification compliance.
5.2 Time of setting measured by this method will not necessarily provide the same results as the time of setting of hydraulic cement paste measured by other methods, or the time of setting of mortar or concrete.
SCOPE
1.1 These test methods determine the time of setting of hydraulic cement by means of the Vicat needle. Two test methods are given; Test Method A is the Reference Test Method using the manually operated standard Vicat apparatus, while Test Method B permits the use of an automatic Vicat machine that has, in accordance with the qualification requirements of this method, demonstrated acceptable performance.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. (Warning—Fresh hydraulic cementitious mixtures are caustic and may cause chemical burns to skin and tissue upon prolonged exposure.)2
1.4 The text of these test methods reference notes and footnotes which provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the standard.
Note 1: For the test method for determining the time of setting by Gillmore needles, see Test Method C266.
1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
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This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: C191 − 21 American Association State
Highway and Transportation Officials Standard
AASHTO No.: T131
Standard Test Methods for
1
Time of Setting of Hydraulic Cement by Vicat Needle
This standard is issued under the fixed designation C191; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope* 2. Referenced Documents
3
1.1 These test methods determine the time of setting of 2.1 ASTM Standards:
hydraulic cement by means of the Vicat needle. Two test C150/C150M Specification for Portland Cement
methods are given; Test Method A is the Reference Test C151/C151M Test Method for Autoclave Expansion of Hy-
Method using the manually operated standard Vicat apparatus, draulic Cement
while Test Method B permits the use of an automatic Vicat C183/C183M Practice for Sampling and the Amount of
machine that has, in accordance with the qualification require- Testing of Hydraulic Cement
ments of this method, demonstrated acceptable performance. C187 Test Method for Amount of Water Required for Nor-
mal Consistency of Hydraulic Cement Paste
1.2 The values stated in SI units are to be regarded as
C219 Terminology Relating to Hydraulic and Other Inor-
standard. No other units of measurement are included in this
ganic Cements
standard.
C266 Test Method for Time of Setting of Hydraulic-Cement
1.3 This standard does not purport to address all of the
Paste by Gillmore Needles
safety concerns, if any, associated with its use. It is the
C305 Practice for Mechanical Mixing of Hydraulic Cement
responsibility of the user of this standard to establish appro-
Pastes and Mortars of Plastic Consistency
priate safety, health, and environmental practices and deter-
C511 Specification for Mixing Rooms, Moist Cabinets,
mine the applicability of regulatory limitations prior to use.
Moist Rooms, and Water Storage Tanks Used in the
(Warning—Fresh hydraulic cementitious mixtures are caustic
Testing of Hydraulic Cements and Concretes
and may cause chemical burns to skin and tissue upon
C595/C595M Specification for Blended Hydraulic Cements
2
prolonged exposure.)
C1005 Specification for Reference Masses and Devices for
1.4 The text of these test methods reference notes and
DeterminingMassandVolumeforUseinPhysicalTesting
footnotes which provide explanatory material. These notes and
of Hydraulic Cements
footnotes (excluding those in tables and figures) shall not be
C1157/C1157M Performance Specification for Hydraulic
considered as requirements of the standard.
Cement
NOTE 1—For the test method for determining the time of setting by
Gillmore needles, see Test Method C266.
3. Terminology
1.5 This international standard was developed in accor-
3.1 Definitions:
dance with internationally recognized principles on standard-
3.1.1 For definitions of terms used in this test method, refer
ization established in the Decision on Principles for the
to Terminology C219.
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
4. Summary of Test Method
Barriers to Trade (TBT) Committee.
4.1 A paste that is proportioned and mixed to normal
consistency, as described in the Test Method C187, is molded
1
These test methods are under the jurisdiction of ASTM Committee C01 on and placed in a moist cabinet and allowed to start setting.
Cement and is the direct responsibility of Subcommittee C01.30 on Time of Set.
Current edition approved Oct. 1, 2021. Published November 2021. Originally
3
approved in 1944. Last previous edition approved in 2019 as C191 – 19. DOI: For referenced ASTM standards, visit the ASTM website, www.astm.org, or
10.1520/C0191-21. contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
2
Section on Safety, Manual of Cement Testing, Annual Book of ASTM Standards volume information, refer to the standard’s Document Summary page on
Standards, Vol 04.01. the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
C191 − 21
Periodic penetration tests are performed on this paste by time intervals not exceeding 10 min and make each penetration
allowinga1mmVicatneedletosettleintothispaste.TheVicat test at least 5 mm away from any previous penetration and at
initial time of setting is the time elapsed between the ini
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: C191 − 19 C191 − 21 American Association State
Highway and Transportation Officials Standard
AASHTO No.: T131
Standard Test Methods for
1
Time of Setting of Hydraulic Cement by Vicat Needle
This standard is issued under the fixed designation C191; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope*
1.1 These test methods determine the time of setting of hydraulic cement by means of the Vicat needle. Two test methods are
given; Test Method A is the Reference Test Method using the manually operated standard Vicat apparatus, while Test Method B
permits the use of an automatic Vicat machine that has, in accordance with the qualification requirements of this method,
demonstrated acceptable performance.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of
the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory
limitations prior to use.
Warning: Fresh hydraulic cementitious mixtures are caustic and may cause chemical burns to skin and tissue upon prolonged
2
exposure.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of
regulatory limitations prior to use. (Warning—Fresh hydraulic cementitious mixtures are caustic and may cause chemical burns
2
to skin and tissue upon prolonged exposure.)
1.4 The text of this standard references these test methods reference notes and footnotes which provide explanatory material.
These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the standard.
NOTE 1—For the test method for determining the time of setting by Gillmore needles, see Test Method C266.
1.5 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
3
2.1 ASTM Standards:
C150/C150M Specification for Portland Cement
1
These test methods are under the jurisdiction of ASTM Committee C01 on Cement and is the direct responsibility of Subcommittee C01.30 on Time of Set.
Current edition approved Aug. 1, 2019Oct. 1, 2021. Published August 2019November 2021. Originally approved in 1944. Last previous edition approved in 20182019
as C191 – 18a.C191 – 19. DOI: 10.1520/C0191-19.10.1520/C0191-21.
2
Section on Safety, Manual of Cement Testing, Annual Book of ASTM Standards, Vol 04.01.
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
C191 − 21
C151/C151M Test Method for Autoclave Expansion of Hydraulic Cement
C183/C183M Practice for Sampling and the Amount of Testing of Hydraulic Cement
C187 Test Method for Amount of Water Required for Normal Consistency of Hydraulic Cement Paste
C219 Terminology Relating to Hydraulic and Other Inorganic Cements
C266 Test Method for Time of Setting of Hydraulic-Cement Paste by Gillmore Needles
C305 Practice for Mechanical Mixing of Hydraulic Cement Pastes and Mortars of Plastic Consistency
C511 Specification for Mixing Rooms, Moist Cabinets, Moist Rooms, and Water Storage Tanks Used in the Testing of Hydraulic
Cements and Concretes
C595/C595M Specification for Blended Hydraulic Cements
C1005 Specification for Reference Masses and Devices for Determining Mass and Volume for Use in Physical Testing of
Hydraulic Cements
C1157/C1157M Performance Specification for Hyd
...
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